Bathtub faucet



FIG. 1 is a top, front, left-side perspective view of a bathtub faucet showing my new design;

FIG. 2 is a rear elevational plan view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a bottom plan view therof; and,

FIG. 6 is a right side elevational view thereof, the left side being mirror symmetrical thereto. 

The ornamental design for a bathtub faucet, as shown and described. 